- "We fight them too, entire armies spilling out of Volkswagens. We do our best to fight them off, but... they keep sending them in."
- ―John Sheppard[src]
Clowns, which Lt. Colonel John Sheppard mentioned to Neera as a joke, are an enemy far worse than the Wraith. Due to her not understanding (Sheppard presumably forgetting she isn't from earth), he couldn't bring himself to tell her the truth. (SGA: "The Hive")
When an alien entity entered Dr. Rodney McKay, a clown was seen in the rowboat with him and Sheppard while he was dreaming. (SGA: "Doppelganger")